NPA	NXX	CLLI	City, ST	Telco
313	222	DTRTMIBLDS2	DETROITZN1	AMERITECH MICHIGAN
313	223	DTRTMIBLDS2	DETROITZN1	AMERITECH MICHIGAN
313	496	DTRTMIBLDS2	DETROITZN1	AMERITECH MICHIGAN
313	962	DTRTMIBLDS2	DETROITZN1	AMERITECH MICHIGAN